package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import net.bytebuddy.asm.Advice;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.codehaus.jettison.util.FastStack;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end){
        //当前集合用于得到从begin到end范围内的每天日期
        List<LocalDate> dateList = new ArrayList();

        dateList.add(begin);

        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天营业额
        List<Double> turnoverList = new ArrayList<>();
        for(LocalDate date : dateList){
            //查询data日期对应时间的营业额数据，营业额是指：状态为”已完成“的订单金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);

            //select sum(amount) from orders where order_time > ? and order_time < ? and status = 5
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 用户数量统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于得到从begin到end范围内的每天日期
        List<LocalDate> dateList = new ArrayList();

        dateList.add(begin);

        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天新增用户数量 select count(user_id) from user where create_time < ? and create_time > ?
        List<Integer> newUserList = new ArrayList<>();
        //存放每天总用户数量  select count(user_id) from user where create_time < ?
        List<Integer> totalUserList = new ArrayList<>();

        for(LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);

            Map map = new HashMap();
            map.put("end",endTime);

            //总用户数量
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);
            //新增用户数量
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }


        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }


    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getordersStatistics(LocalDate begin, LocalDate end){
        //当前集合用于得到从begin到end范围内的每天日期
        List<LocalDate> dateList = new ArrayList();

        dateList.add(begin);

        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> totalOrderCountlist = new ArrayList<>();
        List<Integer> validOrderCountlist = new ArrayList<>();
        //遍历datalist集合，查询有效订单数和订单总数
        for(LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);

            //查询每天订单总数  select count(id) from orders where order_time > ? and order_time < ?
            Integer totalOrderCount = orderMapper.countByMap(map);

            //查询每天有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            map.put("status",Orders.COMPLETED);
            Integer validOrderCount = orderMapper.countByMap(map);

            totalOrderCountlist.add(totalOrderCount);
            validOrderCountlist.add(validOrderCount);
        }
        //计算总订单数量
        Integer totalordercountsum = totalOrderCountlist.stream().reduce(Integer::sum).get();

        //计算总有效订单数量
        Integer validordercountsum = validOrderCountlist.stream().reduce(Integer::sum).get();

        //计算订单完成率
        Double orderCompletionRate = 0.0;
        if(totalordercountsum != 0) orderCompletionRate = validordercountsum.doubleValue() / totalordercountsum;

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(totalOrderCountlist,","))
                .validOrderCountList(StringUtils.join(validOrderCountlist,","))
                .totalOrderCount(totalordercountsum)
                .validOrderCount(validordercountsum)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * top10统计
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO gettop10(LocalDate begin, LocalDate end){
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        //将名字转成字符串，用逗号分隔
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String namelist = StringUtils.join(names, ",");

        List<Integer> number = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberlist = StringUtils.join(number, ",");

        return SalesTop10ReportVO.builder()
                .nameList(namelist)
                .numberList(numberlist)
                .build();
    }


    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response){

        //1.查询数据库，获取营业数据
        LocalDate databegin = LocalDate.now().minusDays(30);
        LocalDate dataend = LocalDate.now().minusDays(1);
        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(databegin, LocalTime.MIN), LocalDateTime.of(dataend, LocalTime.MAX));

        //2.通过poi将数据写入到excel文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //创建excel
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //获取sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据时间
            sheet.getRow(1).getCell(1).setCellValue("时间："+ databegin + "至" + dataend);

            //获得第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            //获得第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for(int i = 0;i < 30;i++){
                LocalDate date = databegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得某一行
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());


            }

            //3.通过输出流将excel文件下载到客户端
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();

        }
        catch (IOException e){
            e.printStackTrace();
        }

    }

}
